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Event: Field inspections have discovered s … Event: Field inspections have discovered several instances of non-conformance with acceptance criteria for fire barriers. The non-conformance has been conservatively assumed to reduce the fire rating of the affected penetrations below the required three hours. </br>At 2050 hours on 2-6-06 the Operations Shift Manager conservatively declared the all Oconee 'NRC committed' fire barrier penetration seals 'inoperable' pending further inspection.</br>Initial Safety Significance: Per NUREG 1022, Section 3.2.4, loss of fire barrier separation of Appendix R trains is an unanalyzed condition. Some Oconee 'NRC committed' fire barriers provide train separation between Appendix R safe shutdown trains. At this time, no specific Appendix R train separation penetrations have been discovered to be non-conforming. The reportability determination is based on the decision to conservatively declare the penetrations inoperable. Implementation of hourly fire watches in the affected areas reduces the potential for a significant fire to develop in those areas. </br>Corrective Actions: Operations entered Selected Licensee Commitment 16.9.5 and established an hourly firewatch in the affected areas. Further inspections continue. Evaluation of inspection findings and repairs will follow.</br>The licensee will notify the NRC Resident Inspector.</br>* * * UPDATE AT 1500 EST ON 3/27/06 FROM R.P. TODD TO S. SANDIN * * * </br>The licensee is retracting this report based on the following:</br>Event: At 1549 on 2-7-06 Oconee Nuclear Station reported that field inspections had discovered instances of non-conformance with a Duke Energy installation specification for fire barrier penetrations in walls and floors. The non-conformance was conservatively assumed to reduce the fire rating of affected penetrations below the required three hours. Reportability was based on the conservative declaration that the penetrations were inoperable.</br>Following additional inspections and review of the as-found conditions, Oconee has determined that the as-found conditions still provided a three hour fire barrier so the fire barrier penetrations were actually operable. Oconee has concluded that the event is not reportable and hereby retracts the ENS notification.</br>Corrective Action(s): Fire barrier penetrations will be repaired to restore compliance with Duke Energy specifications.</br>The licensee will inform the NRC Resident Inspector. Notified R2DO(Carolyn Evans). Inspector. Notified R2DO(Carolyn Evans).
01:50:00, 7 February 2006 +
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15:49:00, 7 February 2006 +
01:50:00, 7 February 2006 +
Event: Field inspections have discovered s … Event: Field inspections have discovered several instances of non-conformance with acceptance criteria for fire barriers. The non-conformance has been conservatively assumed to reduce the fire rating of the affected penetrations below the required three hours. </br>At 2050 hours on 2-6-06 the Operations Shift Manager conservatively declared the all Oconee 'NRC committed' fire barrier penetration seals 'inoperable' pending further inspection.</br>Initial Safety Significance: Per NUREG 1022, Section 3.2.4, loss of fire barrier separation of Appendix R trains is an unanalyzed condition. Some Oconee 'NRC committed' fire barriers provide train separation between Appendix R safe shutdown trains. At this time, no specific Appendix R train separation penetrations have been discovered to be non-conforming. The reportability determination is based on the decision to conservatively declare the penetrations inoperable. Implementation of hourly fire watches in the affected areas reduces the potential for a significant fire to develop in those areas. </br>Corrective Actions: Operations entered Selected Licensee Commitment 16.9.5 and established an hourly firewatch in the affected areas. Further inspections continue. Evaluation of inspection findings and repairs will follow.</br>The licensee will notify the NRC Resident Inspector.</br>* * * UPDATE AT 1500 EST ON 3/27/06 FROM R.P. TODD TO S. SANDIN * * * </br>The licensee is retracting this report based on the following:</br>Event: At 1549 on 2-7-06 Oconee Nuclear Station reported that field inspections had discovered instances of non-conformance with a Duke Energy installation specification for fire barrier penetrations in walls and floors. The non-conformance was conservatively assumed to reduce the fire rating of affected penetrations below the required three hours. Reportability was based on the conservative declaration that the penetrations were inoperable.</br>Following additional inspections and review of the as-found conditions, Oconee has determined that the as-found conditions still provided a three hour fire barrier so the fire barrier penetrations were actually operable. Oconee has concluded that the event is not reportable and hereby retracts the ENS notification.</br>Corrective Action(s): Fire barrier penetrations will be repaired to restore compliance with Duke Energy specifications.</br>The licensee will inform the NRC Resident Inspector. Notified R2DO(Carolyn Evans). Inspector. Notified R2DO(Carolyn Evans).
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Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
22:39:06, 24 September 2017 +
15:49:00, 7 February 2006 +
true +
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0.583 d (13.98 hours, 0.0832 weeks, 0.0191 months) +
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